CN207588742U - The DC brushless motor governing system of Four-switch converter based on modelling - Google Patents

Abstract

The utility model discloses a kind of DC brushless motor governing systems of the Four-switch converter based on modelling, and part and slave computer execution are designed with being controlled part including PC control；PC control design part is PC machine；Slave computer is performed includes DSP main control units, conditioning protection circuit, Drive Protecting Circuit, Four-switch converter, DC brushless motor, sensor group, sample circuit with controlled part.PC machine is as host computer; design the control algolithm model of governing system; through a series of test and validations; automatic code generating simultaneously passes through emulator and downloads to DSP main control units; the output of DSP main control units controls the break-make of switching tube in inverter circuit by Drive Protecting Circuit; and then direct current brushless motor speed is controlled, stator current, the information of voltage of sensor group acquisition motor feed back to controller, and rotating speed is controlled by closed loop.The utility model realizes the accurate control to DC brushless motor governing system, improves product development efficiency, reduces cost, shortens the development cycle.

Description

The DC brushless motor governing system of Four-switch converter based on modelling

Technical field：

The utility model is related to a kind of motor speed regulation system more particularly to a kind of Four-switch converters based on modelling DC brushless motor governing system, belong to power electronics field.

Background technology：

Recently as the extensive use of brshless DC motor, the requirement to its control performance, system cost is higher and higher. It is maintaining motor high performance while is reducing system cost as one of research direction of brshless DC motor, Four-switch converter The topological structure of inverter is changed, the development for reducing system cost as brshless DC motor provides new thinking.However, Complicated due to motor speed regulation system, system signal is various, and control algolithm is complicated, causes overall circuit huge, therefore mesh Preceding a large amount of designs that electric machine speed regulation is carried out using embedded system development.But traditional embedded system development pattern, it is each Stage isolates each other, and hand-coding code efficiency is low, mistake is more, is just tested in the final stage of design, debugging and amendment Difficulty is big, time-consuming, costly so that the development cycle of motor speed regulation system is long, and development cost is high.

Utility model content：

The brief overview about the utility model is given below, in order to provide certain sides about the utility model The basic comprehension in face.It should be appreciated that this general introduction is not the exhaustive general introduction about the utility model.It is not intended to really The key or pith of the utility model are determined, nor intended limitation the scope of the utility model.Its purpose is only with letter The form of change provides certain concepts, in this, as the preamble in greater detail discussed later.

In order to solve above-mentioned existing technical problem, the purpose of this utility model is to provide that a kind of development cost is low, code Reliability is high, debugging is flexible, the development cycle is short, the good Four-switch converter based on modelling of speed governing effect brush DC Motor speed regulation system.

The utility model provides a kind of DC brushless motor governing system of the Four-switch converter based on modelling, Including host computer, DSP main control units, conditioning protection circuit, Drive Protecting Circuit, Four-switch converter, DC brushless motor, biography Sensor group, sample circuit, it is characterised in that：The host computer is established by the code inputs of data line and DSP main control units Connection, the input terminal of the PWM output terminals connection Drive Protecting Circuit of DSP main control units, the output terminal connection of Drive Protecting Circuit The switching tube signal input part of Four-switch converter, the output terminal of Four-switch converter and the input terminal of DC brushless motor are established Connection, DC brushless motor are attached with sensor group, the input terminal of the output terminal connection sample circuit of sensor group, sampling Circuit output terminal connection conditioning protection circuit input terminal, conditioning protection circuit output terminal respectively with DSP main control units Input terminal, the input terminal of Drive Protecting Circuit are attached.

Further：The topological structure of the Four-switch converter, including the first bridge arm, the second bridge arm, third bridge arm, DC bus capacitor.

Further：The DSP main control units are the F28335eZdsp embedded development external members of TI companies production.

Further：The Drive Protecting Circuit uses IR2110 driving chips.

Further：The DC brushless motor governing system of the Four-switch converter based on modelling, it is described First bridge arm includes the second capacitance (C2) being connected in series with and third capacitance (C3), and second bridge arm includes what is be connected in series with First switch pipe（T1）With second switch pipe（T2）, the third bridge arm includes the third switching tube being connected in series with（T3）With Four switching tubes（T4）, each equal anti-paralleled diode of switching tube, switch tube device selection model IGBT Infineon BSM50GB120DN2。

The utility model proposes the DC brushless motor governing system of the Four-switch converter based on modelling reached To effect be：

The utility model is sent signal to DSP master using stator current, the voltage signal of sensor group acquisition governing system Unit is controlled, realizes the electric current to system, speed closed loop control, previous emulation is solved and is caused with the way that control is implemented to detach Unmatched models problem, therefore during invention control design case, constantly improve control algolithm makes defect be exposed to design just Phase.

The utility model establishes the control algolithm model of rotary speed system using the method based on modelling, control direct current without Brush motor rotary speed system solves the development mode of conventional motors governing system separation of software and hardware, development time and required cost Only 1/5 to 1/2 of conventional method or so, embody has great superiority based on design methods.

The utility model establishes control algolithm model, and give birth to automatically using host computer design control system and control algolithm DSP main control units are downloaded into code, enormously simplify the process of hand-coding code, shorten the exploitation design of control system Period reduces cost.

The governing system and control system's development method of the utility model design can be transplanted to other control systems and grind In studying carefully, have broad application prospects.

Description of the drawings：

Attached drawing 1 is the structure diagram of the utility model.

Attached drawing 2 is the structure diagram of the Four-switch converter of the utility model.

Specific embodiment：

The utility model is described in further details below in conjunction with the accompanying drawings.

Referring to Fig. 1, the utility model includes PC control design part and slave computer performs and is controlled part；Wherein, PC machine is in PC control design part, major part of the PC machine as Control System Design, Matlab Simulink environment In build control algolithm model, lead to through a series of test and validations, automatic code generating and by Integrated Development Environment CCS3.3 It crosses emulator and downloads in slave computer embedded controller and run；Slave computer, which is performed, to be included DSP main control units with controlled part, adjusts Reason protection circuit, Drive Protecting Circuit, Four-switch converter, DC brushless motor, sensor group, sample circuit.

PC machine is established by the code inputs of data line and DSP main control units and connected, the PWM outputs of DSP main control units The input terminal of end connection Drive Protecting Circuit, the switching tube signal of the output terminal connection Four-switch converter of Drive Protecting Circuit are defeated Enter end, the output terminal of Four-switch converter and the input terminal of DC brushless motor, which are established, to be connected, DC brushless motor and sensor Group is attached, the input terminal of the output terminal connection sample circuit of sensor group, the output terminal connection conditioning protection of sample circuit The input terminal of circuit, the output terminal input terminal with DSP main control units respectively of conditioning protection circuit, the input of Drive Protecting Circuit End is attached.

The utility model builds the simulation model of control algolithm using Simulink, connects CCS, generation control after compiling automatically Code processed, DSP main control units perform the code of host computer generation, complete required PWM waveform output, need as slave computer Using driving chip, first the PWM amplitudes that DSP pins export are amplified, and trigger signal is exported by Drive Protecting Circuit, The trigger signal of output is sent into inverter circuit, and then is output to brush DC by the three-phase alternating voltage that inverter circuit generates In motor, sensor group acquisition current and voltage signals, and signal is protected into circuit by signal condition, it is output to controller progress A/D is converted, and after phase change logic judges, is carried out rotating speed calculating, is completed the feedback procedure of electric current tach signal, realizes electric current rotating speed Closed-loop control.

The DC brushless motor governing system of Four-switch converter based on modelling, including host computer, DSP master control lists Member, conditioning protection circuit, Drive Protecting Circuit, Four-switch converter, DC brushless motor, sensor group, sample circuit, it is special Sign is：The host computer is established by the code inputs of data line and DSP main control units and connected, the PWM of DSP main control units Output terminal connects the input terminal of Drive Protecting Circuit, the switching tube letter of the output terminal connection Four-switch converter of Drive Protecting Circuit Number input terminal, the output terminal of Four-switch converter and the input terminal of DC brushless motor, which are established, to be connected, and DC brushless motor is with passing Sensor group is attached, the input terminal of the output terminal connection sample circuit of sensor group, the output terminal connection conditioning of sample circuit Protect the input terminal of circuit, the output terminal input terminal with DSP main control units respectively of conditioning protection circuit, Drive Protecting Circuit Input terminal is attached.

The topological structure of the Four-switch converter, including the first bridge arm, the second bridge arm, third bridge arm, DC side electricity Hold, the DSP main control units are the F28335eZdsp embedded development external members of TI companies production, and driving protection is electric Road uses IR2110 driving chips, and first bridge arm includes the second capacitance (C2) being connected in series with and third capacitance (C3), Second bridge arm includes the first switch pipe being connected in series with（T1）With second switch pipe（T2）, the third bridge arm includes The third switching tube being connected in series with（T3）With the 4th switching tube（T4）, each equal anti-paralleled diode of switching tube, the switch Tube device selects model IGBT Infineon BSM50GB120DN2.

The course of work of the utility model is as follows：

The DSP of host computer and slave computer is connected referring to Fig. 1, host computer PC carries out control algorithm design to system, establishes The control algolithm model of system carries out a series of test and validations, real time workshop, and call code Integrated Development to model Environment CCS3.3 downloads to slave computer DSP main control units by emulator.The code of host computer generation is performed, is completed required PWM waveform exports, and using driving chip, is first amplified the PWM amplitudes that DSP pins export, and pass through Drive Protecting Circuit Trigger signal is exported, the trigger signal of output is sent into inverter circuit, and then the three-phase alternating voltage generated by inverter circuit It is output in DC brushless motor, sensor group acquisition current and voltage signals, and signal is protected into circuit by signal condition, it is defeated Go out to controller and carry out A/D conversions, after phase change logic judges, progress rotating speed calculating, the feedback of completion electric current tach signal Journey realizes the closed-loop control of electric current rotating speed, recycles this process.

Method of the DC brushless motor governing system based on modelling of Four-switch converter：

Step 1: building control system model by design platform of MATLAB softwares, the control system model includes electricity Galvanic electricity pressure collection model, A/D transformation models and interruption submodel composition, the interruption submodel judge mould including phase change logic Type, rotating speed computation model, rotational speed regulation model, current regulation model, PWM algorithm model；Current Voltage collection model will acquire Current and voltage signals converted through A/D transformation models and be sent into interruption submodel；Phase change logic judgment models are according to the electricity of acquisition Stream voltage signal carries out commutation judgement and pulse train is converted into tach signal, and tach signal is sent into rotating speed computation model, Gained calculation amount is adjusted by rotational speed regulation model, and obtained regulated quantity is sent into adjusted in current regulation model Amount, regulated quantity select optimized switching state through PWM algorithm module and send out PWM wave, and signal is exported.

Step 2: functional authorization is carried out to established model：The control signal that model exports is sent to governing system In, verify the output result of governing system.The decisions such as Simulink, Embedded Coder are selected in Model Advisor The option of generation code quality checks model.Software is in ring test：The code that model generates counter is encapsulated as S- Function modules i.e. SIL modules compare the output of SIL modules and former module, to confirm the correctness of generation code.Place Device is managed in ring test：Algorithm model needed for system is all included in Controlling model, adds Target in a model Preferences, selection target model F28335eZdsp select generation PIL modules in allocation window and carry out PIL tests, Observation output sees whether meet design requirement.

Step 3: by model debugging to the optimum degree for meeting control requirement, it will be described in step 1 using DO-178B standards Model conversion downloads in system DSP main control units chip into required software code and controls signal to generate, control inverter Switch motion, realize direct current brushless motor speed control.

Claims (5)

1. the DC brushless motor governing system of the Four-switch converter based on modelling, including host computer, DSP master control lists Member, conditioning protection circuit, Drive Protecting Circuit, Four-switch converter, DC brushless motor, sensor group, sample circuit, it is special Sign is：The host computer is established by the code inputs of data line and DSP main control units and connected, the PWM of DSP main control units Output terminal connects the input terminal of Drive Protecting Circuit, the switching tube letter of the output terminal connection Four-switch converter of Drive Protecting Circuit Number input terminal, the output terminal of Four-switch converter and the input terminal of DC brushless motor, which are established, to be connected, and DC brushless motor is with passing Sensor group is attached, the input terminal of the output terminal connection sample circuit of sensor group, the output terminal connection conditioning of sample circuit Protect the input terminal of circuit, the output terminal input terminal with DSP main control units respectively of conditioning protection circuit, Drive Protecting Circuit Input terminal is attached.

2. the DC brushless motor governing system of the Four-switch converter according to claim 1 based on modelling, It is characterized in that：The topological structure of the Four-switch converter, including the first bridge arm, the second bridge arm, third bridge arm, DC side electricity Hold.

3. the DC brushless motor governing system of the Four-switch converter according to claim 1 based on modelling, It is characterized in that：The DSP main control units are the F28335eZdsp embedded development external members of TI companies production.

4. the DC brushless motor governing system of the Four-switch converter according to claim 1 based on modelling, It is characterized in that：The Drive Protecting Circuit uses IR2110 driving chips.

5. the DC brushless motor governing system of the Four-switch converter according to claim 2 based on modelling, institute It states the first bridge arm and includes the second capacitance (C2) being connected in series with and third capacitance (C3), second bridge arm includes being connected in series with First switch pipe（T1）With second switch pipe（T2）, the third bridge arm includes the third switching tube being connected in series with（T3）With 4th switching tube（T4）, each equal anti-paralleled diode of switching tube, switch tube device selection model IGBT Infineon BSM50GB120DN2。